At a glance
If you have had an anal fissure and now have a small tag of skin near the anus, you are dealing with something called a sentinel pile. It is the body’s response to the chronic inflammation and repeated tearing that happens with a fissure that takes a long time to heal.
The question most people ask is simple: will it go away on its own? The honest answer is: usually not. But that does not mean it is a problem that needs solving. Many people live comfortably with a sentinel pile once the underlying fissure has healed.
This guide covers why fissures leave skin tags, what happens to them over time, when removal is worth considering, and how to keep them comfortable if you choose to leave them alone.
Why fissures leave skin tags
An anal fissure is a small tear in the lining of the anal canal. When a fissure becomes chronic — meaning it has not healed within the usual timeframe of a few weeks — the body responds to the ongoing irritation and repeated cycles of tearing and partial healing.
Part of that response is the formation of excess tissue at the outer edge of the fissure. This tissue builds up gradually over weeks and months, creating a small tag of skin that sits at the margin of the anus. This is the sentinel pile.
The name comes from its position: it sits like a sentinel (a guard) at the external end of the fissure. It is often the first thing people notice — the tag is easy to feel, while the fissure itself may be hidden inside the anal canal.
Key things to understand:
- The sentinel pile is made of skin and fibrous tissue, not swollen blood vessels (which is what a haemorrhoid is)
- It forms as a response to chronic inflammation, not as a disease in itself
- It is benign — it is not cancerous and does not become cancerous
- It is extremely common in people who have had chronic fissures
- Its presence does not necessarily mean the fissure is still active
Will it shrink on its own?
This is the question people most want answered, and the honest answer is nuanced.
In most cases, no. Once a sentinel pile has formed, the excess tissue is there. It is not swollen tissue that will deflate — it is structural skin and scar-like tissue. Even after the underlying fissure has healed completely, the sentinel pile typically remains.
Some people do describe modest shrinkage. As the inflammation from the fissure resolves, the area settles. Some of what feels like a large tag may be partly due to swelling and irritation around it. As that resolves, the tag may feel somewhat smaller. But the tissue itself does not usually disappear.
It will not grow if the fissure has healed. A stable, healed fissure means no ongoing inflammation to drive further tissue growth. The sentinel pile tends to stay roughly the same size from this point onward.
If the tag is growing or changing, see your doctor. A sentinel pile that is suddenly getting larger, changing colour, or becoming painful warrants assessment. This is not typical behaviour for a stable sentinel pile and may indicate something else going on.
Is the tag a sign that the fissure has not healed?
Not necessarily. This is a common source of worry that deserves clear reassurance.
A sentinel pile can persist indefinitely after the fissure has fully healed. It is a remnant — evidence that a fissure was once there — not a sign that one is still active. Many people have a stable, painless sentinel pile for years after their fissure resolved.
However, if you are unsure whether your fissure has actually healed, the sentinel pile is not the way to tell. The signs of a healed fissure are:
- Pain-free bowel movements (or at least no longer experiencing the characteristic sharp, tearing pain)
- No bleeding during or after bowel movements
- No spasm or prolonged burning after passing stool
If you still have these symptoms, the fissure may still be active regardless of the state of the sentinel pile. Your doctor can assess this with a brief examination.
When removal is worth considering
Removing a sentinel pile is an elective decision — meaning it is your choice, not a medical necessity. The tag is harmless. There is no medical reason it must be removed.
That said, there are legitimate reasons people choose removal:
Hygiene difficulty. This is the most commonly cited practical reason. A sentinel pile can make thorough cleaning after bowel movements harder. People describe needing to be more careful with wiping, sometimes switching to water-based cleaning or a bidet.
Persistent irritation. Some sentinel piles sit in a position that causes friction or traps moisture, leading to itching or discomfort. This is particularly common in warm weather or after exercise.
Cosmetic concern. Some people feel self-conscious about the tag. This is a valid reason to explore removal — there is no minimum level of discomfort required to consider it.
Planned fissure surgery. If you are having a fissurectomy or LIS surgery for the underlying fissure, the sentinel pile is often removed at the same time. This is a common and straightforward addition to the procedure.
When removal may not make sense
- If the underlying fissure is still active or has not been fully treated — removing the tag while the fissure persists means the tag is likely to recur
- If the tag is small, painless, and not causing any practical problems
- If the recovery period does not fit with your current life circumstances
- If the prospect of another procedure in that area feels like more than you want to deal with right now
The decision is personal. Neither choice — to remove or to leave — is wrong.
What removal involves
Sentinel pile removal is typically a minor outpatient procedure done under local anaesthetic. The tag is excised (cut away), and the small wound is usually left open to heal on its own rather than being stitched closed.
Recovery is generally described as manageable:
- Mild to moderate discomfort for one to three weeks
- A small open wound that needs to be kept clean
- Sitz baths and gentle cleaning during healing
- Light bleeding or discharge for the first week or so
- Full healing over several weeks
If the removal is done alongside a larger procedure (such as fissurectomy or LIS surgery), the recovery follows the timeline of that procedure.
Our sentinel pile removal guide covers this in more detail.
The recurrence question
Can sentinel piles come back after removal? Yes, particularly if the underlying cause has not been addressed.
If the fissure that caused the sentinel pile recurs, the conditions that produced the tag in the first place are back — chronic inflammation, repeated tearing, and the body’s tissue-building response. A new sentinel pile can form at the same site.
This is why most surgeons recommend treating the fissure alongside or before removing the sentinel pile. Addressing the root cause gives the best chance of the area staying clear.
If the fissure has been successfully treated and then the sentinel pile is removed, recurrence is much less likely.
Living with a sentinel pile
Many people choose to leave their sentinel pile alone, and this is a completely reasonable decision. Once the underlying fissure has healed, the tag is typically painless and stable. It is a cosmetic and practical matter, not a medical one.
People who live with sentinel piles describe several adjustments that help:
Cleaning. Gentle, thorough cleaning after bowel movements. Water or a bidet is often more effective than dry toilet paper for cleaning around the tag. Moist toilet tissue can also help, though some people find fragranced versions irritating.
Keeping the area dry. Moisture trapped around the tag can cause itching. Patting dry after cleaning, wearing cotton underwear, and changing if the area becomes moist during the day all come up frequently in accounts.
Knowing your baseline. Getting familiar with what the tag feels and looks like so you can notice any changes. This is not about anxious monitoring — it is about having a reference point.
Letting go of the worry. For many people, the biggest burden of a sentinel pile is the anxiety it causes, not the physical presence. Understanding that it is harmless, stable, and extremely common can go a long way toward reducing that burden.
The bigger picture
A sentinel pile is a very common consequence of a chronic anal fissure. It is not dangerous, it does not need to be removed unless it bothers you, and its presence does not mean your fissure is still active.
If you are dealing with one, you have options: leave it alone, manage it with practical adjustments, or have it removed. None of these choices is wrong. The right answer depends on how the tag affects your daily life and how you feel about it.
If you are unsure whether your fissure has healed, or if the tag is causing symptoms that concern you, your doctor can provide clarity with a brief examination. Our sentinel piles and skin tags guide covers the broader topic in more detail, and our sentinel pile removal guide covers the procedure if that is the direction you are considering.
When to contact your doctor
Seek medical attention if you notice:
- Bleeding from the tag that is heavy or does not stop
- Rapid change in size, colour, or appearance of the tag
- Pain that is severe or worsening
- Signs of infection: spreading redness, warmth, or discharge
- Any new lump in the area that you have not had assessed